Co-ck-sma-ssh, verb
The act of missing a sexual partners poon or stink hole with ones cock and hitting the bit inbetween at full force resulting in a "cocksmash".

So, I was pounding away on this the young filly when I got a tad carried away, pulled out and said, "right little missy, take this one you filthy little harrlot" and went at her with the might of empire, a pain ran up my jonson and I knew straight away there had been a terrible cocksmash, it's been this colour and bent at a 45 degree angle for weeks now, anything you can do doctor?